National defense education is the foundation of building and consolidating national defense and an important way to enhance national cohesion and improve the quality of the whole people. National defense education in schools is an important position of national defense education for the whole people and an important content of implementing quality education. Military training for students is the basic form of national defense education in schools, and it is also an important measure to cultivate national talents and build national defense reserve forces. Military theory course is an important part of students' military training and one of the important contents of teaching in ordinary colleges and universities. Carrying out military training among young students is of great strategic significance for promoting quality education, cultivating qualified personnel for the country, enhancing the national defense concept of the whole people, strengthening national defense modernization, strengthening ideological and political work, strengthening ideals and beliefs, and cultivating high-quality reserve soldiers with ideals, morality, culture and discipline, and certain military knowledge and skills. As the saying goes, "if the country does not prevent it, it will stand, and the people will not be able to live." National defense is the security guarantee for the survival and development of the country, and the fundamental guarantee for ensuring that the internal affairs of the country are not interfered, the sovereignty is not violated, the territory is not divided, the reunification of the motherland is safeguarded, the country's long-term stability is promoted, and the people live and work in peace and contentment. 2. How to join the national defense construction?

2 1 century is an important period for the Chinese nation to realize great rejuvenation, an era of rapid development of high-tech revolution, an era of increasingly globalized economy, politics and culture and accelerated development of knowledge economy. Under this new historical condition, influenced by social changes, the ideological characteristics, modes of thinking and behaviors of contemporary college students have undergone new changes, showing new characteristics. So what should contemporary college students do for national defense? As a contemporary college student, we should first clearly realize that national defense education belongs to the category of basic quality education in the whole education system of colleges and universities. Studying military theory seriously can not only strengthen the concept of national defense, but also improve the comprehensive quality of college students to a great extent. Contemporary college students should fully and seriously understand the knowledge of national defense, recognize the international situation in today's world and deepen their understanding of the significance of national defense. This is not only the responsibility of college students, but also the requirement of patriotism in the new period. Secondly, the most direct way to join the national defense cause is to respond to the call of conscription and become a glorious PLA soldier. With the advent of the information age and the wide application of information technology in the military, information warfare will become the main manifestation of the 2 1 century war. As a contemporary college student, he is at the forefront of information science, learning the most advanced scientific knowledge, and the so-called information war is knowledge war. There are calls for conscription every year, and contemporary college students are also one of the high-quality sources of conscription. They are not only full of vitality, but more importantly, they have advanced scientific and cultural knowledge. I believe that college students' active participation in the army will definitely contribute to the cause of national defense. National defense construction must rely on national construction, and national construction cannot be separated from the participation of the whole people. As a group receiving higher education, college students will inevitably play a powerful role in promoting. As contemporary college students, we should seriously study scientific knowledge and technology, aim high and be brave in making progress. Looking at the world and facing the future, contemporary college students will become a new force in building an innovative country, constantly improve themselves and ensure that China will always be invincible in the fierce international competition. At the same time, we should constantly enhance our awareness of self-innovation and practice. Only by constantly practicing in learning and increasing knowledge in practice can we make better contributions to national construction. College students should also care about their motherland and the world, and be ready to stand up when the motherland needs them.